package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        //  后期需要进行md5加密，然后再进行比对
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
        Page<Employee> page = employeeMapper.pageQuery(employeePageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    @Override
    public void save(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        //对象属性拷贝
        BeanUtils.copyProperties(employeeDTO, employee);
        //设置状态为启用
        employee.setStatus(StatusConstant.ENABLE);
        String password = PasswordConstant.DEFAULT_PASSWORD;
        //设置密码，默认密码123456，使用MD5加密
        employee.setPassword(DigestUtils.md5DigestAsHex(password.getBytes()));
        employeeMapper.insert(employee);
    }
    /**
     * 启用禁用员工账号
     *
     * @param status
     * @param id
     */

    @Override
    public void startOrStop(Integer status, Long id) {
        /*构建 Employee 对象：
        使用 Employee.builder() 创建一个 Employee 构建器。
        设置 id 和 status 属性。
        调用 build 方法生成 Employee对象
         */
         Employee employee = Employee.builder()
                            .id(id)
                            .status(status)
                            .build();
         employeeMapper.update(employee);

    }

    @Override
    public Employee getById(Long id) {
        Employee employee = employeeMapper.getById(id);
        return employee;
    }

    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        //对象属性拷贝
        BeanUtils.copyProperties(employeeDTO,employee);
        employeeMapper.update(employee);


    }

    @Override
    public void editPassword(PasswordEditDTO passwordEditDTO) {
        //获取当前用户id,以及他的信息
        Long empId = BaseContext.getCurrentId();
        Employee employee = employeeMapper.getById(empId);
        String oldPassword = DigestUtils.md5DigestAsHex(passwordEditDTO.getOldPassword().getBytes());
        String originalPassword = employee.getPassword();
        //比对密码
        if ((oldPassword == null || originalPassword == null)||!oldPassword.equals(originalPassword)){
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }
        String newPassword = DigestUtils.md5DigestAsHex(passwordEditDTO.getNewPassword().getBytes());
        //新密码不能与旧密码相同
        if (oldPassword.equals(newPassword)){
            throw new PasswordErrorException(MessageConstant.PASSWORD_EDIT_FAILED);
        }
        //更新密码
        employee.setPassword(newPassword);
        employeeMapper.update(employee);

    }


}
